Drain valve housing



DRAIN VALVE HosING l Y Filed Dec. 28. 1940 .Dmattornellv Patented June29, 1943 UNITED STATES PATENT OFFICE 2,323,224 DRAIN VALVE HOUSINGFrederick C. Kuhnle, Grand Haven, Mich. Application December 28, 1940,Serial No. 372,188

2 Claims.

My present invention relates to improvements in housings for drainvalves, and particularly to housings for combined strainer and drainvalves for kitchen sinks and like receptacle; and the objects ofimprovement are, rst, to provide a housing that will have the lastingbrightness of stainless steel; second, to provide a drain/valve housingthat will remain bright and untarnished' regardless of acid used to freethe drain trap of obstructions; third, to provide a drain valve housingthat can be cleaned without dimming the polish thereof; fourth, toprovide a drain valve housing that requires nothing more to clean itthan a wiping out with a wet cloth; and fifth, to provide a drain valvehousing combining the qualities of stainless steel and of plated brass;and further, to provide a drain valve housing whereof the exposed flangeat the top of the housing will be stainless steel.

I attain these named objects and such other objects as appear from aperusal of the following description when the said description is takenin connection with the accompanying drawing in which is disclosed myimpr-oved drain valve housing, and in which:

Figure 1 is a top plan view of my drain valve housing in which is shownthe interior of the housing and the outwardly extending annular iiangeas engaging the top side of the bottom panel of a kitchen sink or likereceptacle; and

Figure 2 is a vertical sectional view of my drain valve housing taken ana plane extending through the housing on V, the View showing thespecific construction of the housing.

Throughout the drawing, similar numerals refer to similar parts orportions of my drain valve housing, and referring thereto- Numeral lrefers to the bottom panel of a kitchen sink having a anged holetherethrough for receiving the downwardly extending portions of thedrain valve housing, and numeral 2 refers to the externallyscrew-threaded portion of the drain valve housing, which is preferablydrawn from sheet brass of suitable thickness. Numeral 3 refers to thedownwardly extending and externally screw-threaded nipple by which adrain pipe may be connected to the housing and 4 to the inverted conicalportion connecting the nipple 3 with the externally screw-threadedportion 2 and whereby fluids in the drain valve housing structure aretrained to the said nipple to be conducted therefrom by a drain pipeconnected thereto. Numeral 5 refers to the upwardly and outwardly curvediiange terminating at its juncture with the portion 2 in shoulder '6.Numeral kl refers to an annular groove at the inner periphery of housingportion 2 and in spaced apart relation to the shoulder 6; the purpose ofthe groove 'l is to receive the edge 8 of the rolllike corrugation 8 andform a joint that will securely hold the stainless casing 9 in' thehousing portion 2 and prevent accumulation of dirt under the casing.Numeral l0 refers to the reduced-thickness portion of the upwardly andoutwardly curved iiange 5 where the said ilange 5 together with thecasing extending under the flange is drawn into the recess Il by thering nut l2 engaging flexible ring gasket; I3.

In producing my improved drain valve housing, I rst provide a sheet ofdesired-thickness suitable free-cutting metal, from which I stamp acircular disc of desired diameter; I then place the said disc insuitable drawing dies mounted in a drawing press and draw the disc bythe dies to substantially the form shown in the accompanying drawing,which form includes cylindrical portion 2, the externally screw-threadednipple 3, the inverted conical portion 4, the upwardly and outwardlycurved flange 5 and shoulder `li. Having drawn the said disc tosubstantially the form shown in the drawing, I cut screw threads on theouter periphery of the portion 2 and the nipple 3, and having cut thesaid screw threads, I cut annular groove 'l in the inner periphery ofthe portion 2 and reduce the thickness of the flange 5 at Ii). Havingperformed the operations described, I provide a thin sheet of stainlesssteel or other non-rustable metal, from which I cut a disc of suitablediameter for forming the casing 9, and partly draw and partly spin thesaid disc to the form shown, including the roll-like corrugation 8', thereverse curved portion resting on the shoulder E and the upwardly andoutwardly curved portion embracing the flange 5. Having formed thestainless metal casing 9 as described, I force the casing into thehousing portion 2 and its edge 8 into annular groove l with its reversecurve resting on the shoulder 6 and its upwardly and outwardly curvedportion resting on the upwardly and outwardly curved flange 5, in whichposition the outer periphery of the casing will extend beyond the outerperiphery of the flange 5 at lu, which extended portion of the casing Ispin around and under the reducedthickness portion I0 of the said flange5. When the drain valve housing has been assembled as described, theexposed portions of the stainless steel casing are bulfed to smooth andbrighten their exposed surface, after which it is only necessary to wipethe surface to keep it bright.

Having described my present invention, I claim:

1. A drain valve housing comprising a hollow cylindrical body portionhaving an upward and outward extending flange, a shoulder at the innerperiphery of the cylindrical body portion in spaced apart relation tothe upward and outward extending ange, an annular groove in the innerperiphery of the said cylindrical tubular` portion in spaced apartrelation to the said shoulder and a casing of thin metal extending overthe said upward and outward extending flange and extending under thesaid flange at the periphery thereof and engaging the said shoulder andextending into the said annular groove substantially as described.

2. In a drain valve housing having a hollow cylindrical body portionprovided with an upwardly and outwardly extending curved flange, ashoulder at the inner periphery of the cylindrical body portion inspaced apart relation to the upwardly and outwardly extending ange and acasing of non-rustable metal extending from adjacentthe said shoulderover the said upwardly and outwardly extending flange and at theperiphery of the flange.

FREDERICK C. KUHNLE.

